Terrazzo surfacing machines



July 30, 1957 F. P. VINELLA TERRAZZO SUREACING MACHINES s Sheet s-Sheet 1 Filed Oct. 18. 19515 D M m E mm/ WV P k N R. Y B

AIToRNEY July 30, 1957 F. P. VINELLA TERRAZZO SURFACING MACHINES Filed 001;. 18, 1955 6 Sheets-Sheet 2 FRANK P. VYINELLA ATTO BN E Y July 30, 1957 F. P. VVINELLA 2,300,749

TERRAZZO SURFACING MACHINES Filed Oct. 18, 1955 e Sheets-Sheet s FIC-3 ATTOR N EY F. P. VINELLA TERRAZZO SURFACING MACHINES July 30, 1957 6 Sheets-Sheet 4 Filed Oct. 18, 195 5 m M o L N M my m w m K A P K w N A R F V: B m

July 30, 1957 F. P. VINELLA TERRAZZO SURFACING MACHINES FIG. 8

Filed Oct. 1 1955 FIG. 6

IIIIIII/IIIII y II llu -32 -30 ATTORNEY July 30, 1957 F. P. VINELLA 2,800,749

TERRAZZO SURFACING MACHINES Filed Oct. 18., 1955 6 Sheets-Sheet 6 INVENTOR. FRANK P. VINELLA ATTORNEY United StatesPatentO 2,800,749 I TERRAZZO SURFACING MACHINES Frank P. Vinella, Minneapolis, Minn. Application October 18, 1955', Serial No. 541,236

1 Claim. (c1. 51-480 My invention relates to an improvement in a surfacing machine and more particularly. to a machine for surfacing terrazzo baseboard cove moldings.

Itis an object of my invention to provide a machine for surfacing terrazzo cove moldings which is easily controlled and moved over the floor by the operator in a standing position. 7

It is also an object to provide a machine which has a grinding head that may be selectively positioned so that the machine may be moved in either direction along the cove molding without changing the facing of the machine to thereby easily surface the entire cove molding to each corner of the room at the end of the given section of molding.

It is a further object of my invention. to provide a machine for surfacing cove moldings'in which the grinding head may be adjustably positioned so that the same will grind a cove having a vertical or angularly disposed face surface. It is an additional object to provide a machine which has a grinding head adjustable vertically by the operator in a standing position.

I shall not here attempt to set forth andindicate all of the various objects and advantages incident to my invention but other objects and advantages will be referred to in or else will become apparent from that which follows. 7

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings, showing by way of example a preferred embodiment of the inventive idea wherein like numerals are employed to designatev like parts throughout.

In the drawings forming part of this application:

Figure 1 is a front elevationalview of my terrazzo surfacing machine with the grinding head in lowered vertical grinding position against a cove molding shown in section. V s 1 Figure 1A is a front view of a portion of thesupporting housing and grinding head in an angular position for grinding an angularly faced cove molding shown in section.

Figure 2 is a side elevational view. of mymachine.

Figure 3 is a side view opposite to that shown in Figure 2.

Figure 4 is a top plan view thereof.

Figure 5 is a longitudinal section through a portion of the base on the line 5-5 of Figure 1 showing the base tilting mechanism.

Figure 6 is a sectional view on the line 6-6 of Figure 2.

Figure 7 is a sectional view on the line 7-7 of Fig ure 3 showing the surfacing head and the drawing mechanism therefor.

Figure 8 is a longitudinal sectional view on the line 8-8 of Figure l of the head driving mechanism v Figure 9 is a detailed view of'a portion of the surfacing head raising and positioning" mechanism.

Figure 10 is a detailed transverse sectional view of the bar of the raising and positioning mechanism shown in Figure 9.

Figure 11 is a longitudinal sectional view of the lower portion of the surfacing head positioning and raising mechanism.

Figure 12 is a longitudinal side view of the lower portion of the wheel steering mechanism.

Figure 13 is a top plan view of the steering mechanism illustrated in Figure 12 partly in section with a portion of the base member cut away.

Referring to the drawings in detail, my terrazzo surfacing machine A includes the horizontally disposed base member 10. Secured to the base 10 by means ofthe bolts 11 are the upright standards 12 and 13. The upper ends of the standards 12 and 13 are connected to the bearing members 13 which in turn are connected to the frame ring 14. The frame ring 14 is also supported by the upright support members 15 and 16 the lower ends of which are secured to the base 10 by means of the bolts 17 and the upper ends being welded to the ring 14.

I further provide the electric motor 18 which is securely mounted on the base 10 by means of the bolts 19. The motor 18 includes the conventional shaft 20 on which is mounted the toothed pulley 21 by means of the set screw 22. Mounted on the housing of the motor 18 isthe circular end member 23 formed with the upstanding annular flange portion 24 on which is formed the outer-flange portion 25. The outer flange portion 25 is tapered as at 26 and is formed with the bearing surface 26'.

Cooperatively connected with the end member 23 is the elongated drive housing 27 which has formed on the upper end thereof the annular flange portion 28 formed with the bearing surface 29 which contacts the bearing surface 26. formed with the annular flange 30 corresponding to the flange 25 and having thetapered portion 31. The face 32 of the upper end of the housing 27 rotatably bears against the face 33 of the upstanding flange portion 24.

The drive housing 27 is pivotally and adjustably mounted on the flange portion 24 by means of the U- shaped circular split collar 34 which is drawn up on the tapered bearing surface 26 and the tapered bearing surface 31 thereby grinding the face surfaces 32 and 33 in intimate gripping contact. The split collar 34 has formed on the adjacent ends thereof the upstanding lug portions 35 formed with a hole therethrough and through which extends the bolt member 36. One end of the bolt 36 is pivotally connected to the bifurcated cam end 37 of the handle 38, the cam surface 39 thereof acting against the shoulder collars 49 mounted on the bolt 36. With the handle 38 in the substantially upright position shown in Figure 3 the cam surface 39 bears with less pressure against the collars 40. The housing 27 may be pivoted to any position between that shown in full line in Figure 3 to that shown in broken lines. With the handle 38 placed in a substantially horizontal position, the same increases the gripping action of the collar 34 due to the action of the cam surface 39, and as a result the housing 27 may be secured.

The lower end of the drive housing 2'7 is formed with the flange portions 41 and 42. The cap member 43 is mounted on the flange 42 by means of the bolts 44. Mounted within the cap 43 is the tapered bearing 45 in which the reduced end 46 of the secondary hollow shaft 47 is mounted. Further, the toothed pulley 48 is securely mounted on the shaft 47 adjacent the annular shoulder 49 by any suitable means. The reduced portion 50 of the shaft 47 is mounted in the tapered bearing 51 secured in the flange portion 41. The portion 50 The upper end of the housing 27 is also of the shaft 47 extends through the end member 52 formed on the flange 41.

Mounted on the outer reduced end portion 53 of the shaft 47 is the flexible cupling 54 formedwith the annular fiange 55 which overlies the end member 52;The grinding head 56 formed with the radius 56 issecur ely mounted on the coupling by any suitable means well known in the art; e

The cap member 43 has mounted thereon the spaced pin members 57 and 58 the purpose of which will be hereinafter set forth. I further provide the toothed belt 59 which is mounted on the toothed pulleys 21 and 48 which drives. the grinding head 56 by means of the construction hereinbefore set forth. 7

So that the grinding head 56 may be positioned at a secured desired height relative to the cove B and/ or the floor surface indicated as C, I provide a bar'member 60 having the elongated recess 61 formed therein. The inner end 62 of the bar 60 is pivotally mounted on the pin 63 which is connected by means of the bracket 64 to the underside of the base 10. Slidably extending into the recess 61 of the hollow bar 60 is the adjustable bar 65 formed with the longitudinally extending open ended slot 66 which receives the pin 57 when a small grinding head 56 is used and the same receives the pin 58 when a larger diameter head 56 is to be used.

Either of the pins 57 or 58 is maintained in the slot 66 by means of the vertically mounted pin 67 connected to the rod portion 68 slidably mounted in the cylindrical housing 69. The pin portion 67 shown in broken lines in Figure 11 in a lowered position, extends downwardly through the reduced housing portion 70, through the hole 71 of the bar 65, and into the slot 66. The pin 67 may be raised by means of the knurled knob 72 secured to the rod portion 68 thereby lifting the stop lug 73 from the slot 74. The pin 67 may then be maintained in raised position by rotating the knob 72 slightly so that the lug 73 rests on the top edge of the cylindrical housing 69. The reduced housing portion is secured to the top edge of the bar 65;

- The slotted end 66 of the pivoted bar member 60 together with the slidable bar 65 is lifted or lowered to lift or lower the head 56, by means of the link member 74 pivotally connected to the bar 60 by means of the pin 75, Figure 11. The link 74 is pivotally connected at its upper end to the bifurcated outer end 76 of the bar 77 by means of the pin 78. The bar 77 has formed therethrough the slot 79, Figure 9, through which the bolt 80 extends, the bar 77 being positioned between two cylindrical mounting members 81 through which the bolt 80 also extends. The bolt 80 is secured by screwing the same into a threaded hole provided in the base 10, and the lower member 81 acts as a fulcrum for the bar 77.

I also provide the vertically disposed threadedrod 82, the lower end of which engages a threaded nut 82' pivotally mounted in the slot 82 formed through the inner end portion 83 of the bar 77 As the threaded rod 82 is turned, so is the bar 77 raised or lowered depending upon the direction of turning of the rod. The threaded rod 82 extends freely through a hole 83' formed in the top portion 84 of the inverted U-shaped support 85. Connected to the top portion 84 are the depending leg members 86 and 87 thereby making up the support 85. The lower ends of the legs 86 and 87 are secured to the base 10 by any suitable means.

The upper end of the adjusting threaded member 82 is secured to the cylindrical rod member 88 the bottom end of which rotates on the upper surface of the top piece 84. In addition I provide the upper rod member 89 which is connected at its lower end to the upper end of the rod member 88 by means of the universal joint 90. The upper end of the rod 89 is connected to the shaft 91 by means of the universal joint 92 The shaft 91 is rotatably mounted in the upper flange portion 93. of the 4 bracket 94 which is secured to the vertical support members -15 and"16,Figures land 3.

Connected to the upper end of the shaft 91 is the Wheel 95 formed with the handengageable knob 96 used to rotate the wheel 95 which, through the mechanism previously described, moves the outer end of the bar 60 up or down thereby moving the head 56 when either the pin 57 or 58 is positioned in the slot 66. When the wheel 95 is rotated in a clockwise direction the head 56 is lowered.

In addition I provide means for tilting the head 56 as illustrated in Figure 1-A by tilting the base 10 of the machine as indicated in Figure6. Such tilting means includes a horizontally disposed shaft 96' mounted on the bearing supports 97 and 98 which are secured to the base 10. The shaft 96' is rotated by means of the handle knob member 99 secured to said shaft. The shaft 96' has formed thereon the worm gear 100 which engages the vertically disposed gear- 101 secured to the shaft 102 rotatably mounted in the depending bearing member 103 secured to the underside of the base 10.

Secured to theouter enlarged end 104 of, the shaft 102 is the arm member 105 which has mounted on the outer end,thereof the shaft 106 on which the supporting wheel 107 rotates. As the handle knob member 99 is turned in a counterclockwise direction the worm gear 100 turns'the gear 101 int; clockwise direction thereby moving the outer-end of the arm 105 downwardly in turn forcingthe base 10 upwardly (as indicated in broken lines in Figure 6)-a'gainst the static position of the wheel 107. As theibase' 10 is thereby raised at the point of the arm 105, the grinding head 56 is tilted to the angle shown in Figured-AL, The head 56 is returned to a vertical position of Figure 1 by rotating the knob 99 in a clockwise direction:

Mounted on top' of the motor 18 by means of the brackets 108 is the cylindrical water reservoir or tank 109 which has leading therefrom the water supply hose 110. The hose 110 is forced onto the outer end of the threaded connectorlll which is threadedly engaged to the cap 43. The tube 111' is soldered to the inside of the cap 43 and extends longitudinally and axially through the hollow shaft 47, through the spring 112', the flexible mount 113' and the threaded connector 114' to the point 112 whereby the head 56 may be kept constantly wet for grinding. The'button head cap screw secures the head 56 to the member 56" which in turn is secured to the flexible mounting 113' by suitable spaced bolts not shown. The flexible'mounting 113-is secured to the coupling 54 by means of the bolts 54'.

A pet cock 113 is used to regulate the flow of water from the tank or reservoir 109. The pet cock 113 has an extension handle 114 formed thereon for easy use by the operator.

I further provide the cover member 114" for the tank 109 which is held in place by means of the elongated clamp rods 115 secured at their lower ends to the brackets 108. The upper hook ends 116 of the rods 115 bear down on the cover 114". The cover 114" is provided with the tiller opening member 117.

For further supporting and steering my machine A I provide the tandem wheels 118 rotatably mounted in the inverted U-shaped brackets 119. The brackets 119 are rotated and bear against the underside of the collar members 120 whichare secured to the underside of the base 10. The brakets 119 are rotated by means of the vertical. control rods 121, the lower ends of which extend through the base 10 and are secured to said brackets. The upper pivotally mounted to the under surface of the base by means of the shaft 124 secured to the base 10 by means of the block member 125. The plate 123 has formed therein the oppositely disposed'slots or recesses 126 into which the inner ends 127 of the rods 128 extend and which are pivotally mounted therein by means of the pins 129. The outer ends of the rods 128 are pivotally connected to the short arm members 130 by the pins 131. The short arms 130 are secured to the wheel support members 119. It is thus apparent that as either handle 122 is pivoted both wheels 118 are turned through the steering mechanism above described for easy, positive and quick action turning and manipulating of the machine.

I further provide the panel support member 132 which is mounted between and secured to the upright supports and 16. The main switch box 133 mounted on the panel 132 is provided with the conventional start and stop buttons 134 and 135. Also mounted on the panel member 132 is the voltage converter box 136 which is connected to the main switch box 133. In addition I provide the reversing switch 137 interconnected with the switch 135 and the converter box 136 with the electrical conduit 138 leading from the converter box 136 to the motor 18. When the housing 27 and head 56 is pivoted from the position shown in full line in Figure 3 to the position shown in broken lines of the same Figure 3 it is apparent that the direction of rotation of the head 56 must be reversed from that shown, and this change in direction of rotation is accomplished by use of the reversing switch 137 which also includes a stop button.

With the grinding head 56 in the position shown in full line in Figure 3, a cove molding may be surfaced right up to the end of the same at a corner. Then without moving the machine the head 56 is pivoted to the position shown in broken lines in Figure 3 whereby the same strip of cove molding may be surfaced right up to the opposite end at the opposite corner with a minimum of finishing to be done by a small hand unit.

The invention is not to be understood as restricted to the details set forth since these may be modified within the scope of the appended claims without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

In a terrazzo surfacing machine, a supporting base, a horizontal frame secured to and spaced from said base,

.an electric motor mounted on said base, a drive housing end, pin means connected to the lower end of said drive housing and adapted to be engaged in the slotted end of said slidable adjustable bar, releasable means for maintaining said pin means in said slotted end, a link member pivotally connected to the outer end of said pivoted bar, a bar member fulcrumed on said base and having the outer end pivotally connected to the upper end of said link member, screw means attached to the inner end of said fulcrumed bar, means mounted on said horizontal frame and connecting with said screw means for actuating said screw means to raise or lower the inner end of said fulcrumed bar to thereby raise or lower said grinding head, means for tilting said supporting base to thereby tilt said grinding head, the lower end of said driving head having a tubular member extending therethrough to said grinding head, a water supply tank mounted on said motor, a hose line connecting said supply tank with said tubular member, wheel means pivotally mounted on said base support and steering means mounted on said frame and connecting with said wheels adapted to move said wheels.

References Cited in the file of this patent UNITED STATES PATENTS 1,760,832 Jacobson May 27, 1930 1,876,380 Wittick Sept. 6, 1932 2,265,354 Dahl Dec. 9, 1941 2,291,058 Pohl July 28, 1942 2,298,228 Pond Oct. 6, 1942 2,484,906 Pond Oct. 18, 1949 2,680,942 Portnow June 15, 1954 

